Frost Dates for 63730 — Advance, Missouri

Half of springs at Advance 1 S, MO see their last 32°F night by April 7; only one in ten is past it by March 22, and one in ten still has one after April 21. Planting tender crops after April 12 leaves a 30% risk of a frost on them, after April 16 20%, and after April 21 10%. The 14 days between the even-odds date and the one-in-ten date is narrower than at 80% of the 158 Missouri stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 27 in half of years, as early as October 15 one year in ten, and holds off past November 9 one year in ten. A hard freeze of 28°F follows 11 days later, around November 7; in spring the one-in-ten date for 28°F is April 11, 10 days before the 32°F one. The freeze-free season lasts 204 days in a typical year, longer than at 79% of the 158 Missouri stations; it reaches 225 days one year in ten and falls short of 185 one year in ten. On average 97 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 10 days longer, to about April 17, and return around October 17. Severe cold of 16°F or below comes every winter, usually between December 18 and February 22.

July is the warmest month at Advance 1 S, MO, averaging 89°F by day and 69°F at night; January is the coldest at 42°F and 25°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 70% of years.

Warmth for growing adds up to 4,268 growing degree days a year (base 50°F), more than at 77% of the 158 Missouri stations. 38% of them (1,606) have built up by the end of June, and July adds the most, 897.

The nearest other station, Marble Hill, MO, 14 miles north of Advance, has a last frost 5 days later (April 12), a first frost 4 days earlier (October 23), a season 11 days shorter.

The first measurable snow (0.1 inch or more) in Advance usually arrives around December 26, and the last of the season around February 12. Those are the middle dates across the winters of 1991–2020 at Marble Hill, MO, 14.2 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 54 days after the last snow.

ZIP 63730 is under a mile from Advance 1 S, MO, which stands at 360 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 63825 (Bloomfield). The 2023 USDA Plant Hardiness Zone Map lists ZIP 63730 in zone 7a, the band where the coldest night of the year averaged 0 to 5°F (-17.8 to -15.0°C) over 1991–2020; a zone describes winter lows, not frost dates.